package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServicelmpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Override   //新增菜品跟口味
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);
        //获取insert语句生成的id，必须在sql语句上添加两个属性
        Long dishId = dish.getId();
        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishId);
            }
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {

        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);


        return new PageResult(page.getTotal(), page.getResult());
    }

    //菜品批量删除，
    /*
     * @param ids
     * */
    @Override
    @Transactional //将事务提交上去
    public void deleteBatch(List<Long> ids) {
        // 判断当前菜品是否处于启售状态，如果是 ，就不能删除
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);

            if (dish.getStatus() == 1) {
                //当前菜品处于启售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            } else {

            }
        }

        //判断当前菜品是否处于套餐中 如果是，则不能删除
        List<Long> setmealsdish = setmealDishMapper.getSetmealDishId(ids);
        if(setmealsdish!=null && setmealsdish.size() > 0)
        {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品数据
        /*for (Long id : ids) {
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        }*/
       //根据ID来批量删除菜品 口味 不像上面的删除要执行多次SQL语句
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);
    }

    //根据ID来查询菜品和对应的口味
    @Override
    public DishVO getByidwithFlavor(Long id) {
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(flavors);
        return dishVO;
    }

    //根据ID来修改菜品基本信息和对应的口味信息
    //修改口味数据  我们可以将原有的数据删除，再插入
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
       //修改菜单基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //修改
        dishMapper.update(dish);

        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }
    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {

        Dish dish =Dish.builder().
                categoryId(categoryId).
                status(StatusConstant.ENABLE)
                .build();
        return  dishMapper.list(dish);
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }
}
